What does air contain
ICSE · Class 2 · Science
Flashcards for What does air contain — ICSE Class 2 Science. Quick Q&A cards covering key concepts, definitions, and formulas.
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What is air made of?
Answer
Air is made of gases like oxygen, water vapour, dust particles, smoke, and germs. We cannot see most of these, but they are all around us.
Why do we need oxygen?
Answer
We need oxygen to breathe. Both humans and animals use oxygen to stay alive. Without oxygen, we cannot live.
What happens to water spilled on the floor?
Answer
The water changes into water vapour due to heat and mixes with the air. That’s why it disappears after some time.
What is water vapour?
Answer
Water in the form of gas is called water vapour. When water gets heat, it turns into vapour and goes into the air.
Why do wet clothes dry in the sun?
Answer
The heat from the sun turns the water in wet clothes into water vapour. This vapour goes into the air, so clothes become dry.
Where does dust in the air come from?
Answer
Dust comes from soil, roads, construction, and dry leaves. When wind blows, it carries dust into the air.
What is smoke?
Answer
Smoke is made when something burns, like wood, paper, or fuel in vehicles. It goes into the air and makes it dirty.
How does vehicle smoke affect air?
Answer
Smoke from vehicles mixes with air and makes it dirty. Breathing dirty air can make us sick and harm our lungs.
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